Abstract
The lightweight aluminum 3D curved structure part has the characteristics of high structural strength, excellent aerodynamic performance, and flowing geometric shape. It is increasingly used in the fields of railway transportation, aerospace, and other high-end vehicle manufacture industry. However, with the increase of forming dimensions, as well as the large, thin-walled, complex forming features, it is urgent to study the precise plastic forming method for this kind of difficult-to-deform materials. Based on the new type of flexible multi-points 3D stretch-bending (3D FSB) process, the precision forming method for these hard-to-deform parts was studied in this paper. Extensive numerical simulations for the 3D FSB forming of the target parts have been performed by finite element methods. The simulation results show good agreement with the experiment results, and the max shape error of springback prediction is less than 0.3 mm. Then, based on the measured shape error of the 3D formed parts, an iterative overbending method for envelope surface of the multi-point die (MPD) is proposed to realize precise forming of the 3D curved structure parts. After four times adjustment of MPD, the simulation results show that the contour error is reduced from 1.01 to 0.06%, the maximum springback error changes from 30.16 to 1.66 mm. According to the adjustment parameters acquired in the optimization process, the actual experimental measured contour error is 0.05%, the maximum springback error is 1.41 mm, which achieved the forming requirements of the target parts and verified the effectiveness of the compensation method.
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Chatti S, Hermes M, Tekkaya AE, Kleiner M (2010) The new TSS bending process: 3D bending of profiles with arbitrary cross-sections. CIRP Ann Manuf Technol 59(1):315–318
Hermes M, Staupendahl D, Becker C, Tekkaya AE (2011) Innovative machine concepts for 3D bending of tubes and profiles. Key Eng Mater 473:37–42
Zhan M, Wang Y, Yang H, Long H (2016) An analytic model for tube bending springback considering different parameter variations of Ti-alloy tubes. J Mater Process Technol 236:123–137
Dong J, Liu Y, Yang H (2016) Research on the sensitivity of material parameters to cross-sectional deformation of thin-walled rectangular tube in rotary draw bending process. J Mater Res 31(12):1784–1792
Liu N, Yang H, Li H, Yan S (2016) Plastic wrinkling prediction in thin-walled part forming process: a review. Chin J Aeronaut 29(1):1–14
Müller KB (2006) Bending of extruded profiles during extrusion process. Int J Mach Tool Manu 46(11):1238–1242
Luoxing LI (2012) Advanced extrusion technology and application of aluminium, magnesium alloy for vehicle body. J Mech Eng 48(18):35 (in Chinese)
Geiger M, Arnet H, Vollertsen F (1995) Flexibles Biegen Stranggepresster Aluminium profile. Blech Rohre Profile 42(1):31–34
Zhu-Bin HE, Lin YL, Sun HY (2012) On curvature radius of profiles bent with single roller and hyper-elastic pad. Mater Sci Technol 20(5):1–5
Liang JC, Gao S, Teng F, Yu PZ, Song XJ (2014) Flexible 3D stretch-bending technology for aluminum profile. Int J Adv Manuf Technol 71(9–12):1939–1947
Gao S, Liang JC, Teng F, Chen GY, Wei ZY (2014) Shape control of parts formed by means of flexible 3D stretch-bending technology. Huanan Ligong Daxue Xuebao/J South China Univ Technol 42(9):53–58 (in Chinese)
Gao S, Liang JC, Chen GY, Wei ZY, Teng F (2014) Rapid adjusting of fundamental units in process of flexible 3D stretch-bending. Jilin Daxue Xuebao 44(6):1723–1727 (in Chinese)
Teng F, Zhang W, Liang J, Gao S (2015) Springback prediction and optimization of variable stretch force trajectory in three-dimensional stretch bending process. Chin J Mech Eng 28(6):1132–1140
Cai ZY, Wang SH, Xu XD, Li MZ (2009) Numerical simulation for the multi-point stretch forming process of sheet metal. J Mater Process Technol 209(1):396–407
Amini M, Bakhshi M, Fesharaki JJ (2014) Design, fabrication, and use of a new reconfigurable discrete die for forming tubular parts. Int J Adv Manuf Technol 75(5–8):1055–1063
Wang S, Cai Z, Li M, Lan Y (2012) Numerical simulation on the local stress and local deformation in multi-point stretch forming process. Int J Adv Manuf Technol 60(9–12):901–911
Heo SC, Kim JN, Song WJ, Ku TW, Kang BS (2012) Shape error compensation in flexible forming process using overbending surface method. Int J Adv Manuf Technol 59(9–12):915–928
Abosaf M, Essa K, Alghawail A, Tolipov A, Su S, Pham D (2017) Optimisation of multi-point forming process parameters. Int J Adv Manuf Technol 92(6):1–11
Cai ZY, Wang SH, Li MZ (2008) Numerical investigation of multi-point forming process for sheet metal: wrinkling, dimpling and springback. Int J Adv Manuf Technol 37(9–10):927–936
Wang S, Cai Z, Li M (2010) Numerical investigation of the influence of punch element in multi-point stretch forming process. Int J Adv Manuf Technol 49(5–8):475–483
Li L, Seo YH, Heo SC, Kang BS, Kim J (2010) Numerical simulations on reducing the unloading springback with multi-step multi-point forming technology. Int J Adv Manuf Technol 48(1–4):45–61
Wagoner RH, Lim H, Lee M-G (2013) Advanced issues in springback. Int J Plast 45(0):3–20
Tan F, Li M, Cai Z, Li X (2009) Formability analysis on the process of multi-point forming for titanium alloy retiary sheet. Int J Adv Manuf Technol 41(11–12):1059–1065
Lingbeek RA, Gan W, Wagoner RH, Meinders T, Weiher J (2008) Theoretical verification of the displacement adjustment and springforward algorithms for springback compensation. Int J Mater Form 1(3):159–168
Yang XA, Feng R (2011) A die design method for springback compensation based on displacement adjustment. Int J Mech Sci 53(5):399–406
Karafillis AP, Boyce MC (1992) Tooling design accomodating springback errors. J Mater Process Technol 32(1–2):499–508
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The National Natural Science Foundation of China (51675225) provided the financial support.
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Gao, S., Liang, Jc., Li, Y. et al. Precision forming of the 3D curved structure parts in flexible multi-points 3D stretch-bending process. Int J Adv Manuf Technol 95, 1205–1213 (2018). https://doi.org/10.1007/s00170-017-1276-z
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DOI: https://doi.org/10.1007/s00170-017-1276-z